×

Electroluminescent display

  • US 5,416,494 A
  • Filed: 12/23/1992
  • Issued: 05/16/1995
  • Est. Priority Date: 12/24/1991
  • Status: Expired due to Term
First Claim
Patent Images

1. An EL display comprising:

  • a first EL element and a second EL element, wherein each EL element includes;

    a pair of electrodes; and

    an EL photoemissive layer disposed between the electrodes, wherein the EL photoemissive layer is capable of emitting light when a voltage applied between the electrodes is equal to or greater than a threshold value; and

    voltage feed means for applying a first ac voltage between the electrodes of the first EL element, and for applying a second ac voltage between the electrodes of the second EL element at the same time as the application of the first ac voltage, wherein the first ac voltage has a value which is equal to or greater than the threshold value, wherein the second ac voltage has a polarity which is opposite to a polarity of the first ac voltage so that the application of the second ac voltage at the same time as the application of the first ac voltage enhances a noise suppression effect, wherein the second ac voltage has a value which is equal to or greater than the threshold value when photoemission of the second EL element is required, and wherein the second ac voltage has a value which is smaller than the threshold value when photoemission of the second EL element is not required.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×